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CVE-2009-4500

Status: ModifiedMedium (5)—

The process_trap function in trapper/trapper.c in Zabbix Server before 1.6.6 allows remote attackers to cause a denial of service (crash) via a crafted request with data that lacks an expected : (colon) separator, which triggers a NULL pointer dereference.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Zabbix — Zabbix

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2009-4500",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
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        "userInteractionRequired": false
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  "published": "2009-12-31T18:30:01.750",
  "references": [
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      "url": "http://secunia.com/advisories/37740",
      "tags": [
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      "source": "cve@mitre.org"
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    {
      "url": "https://support.zabbix.com/browse/ZBX-993",
      "tags": [
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          "value": "CWE-119"
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      "lang": "en",
      "value": "The process_trap function in trapper/trapper.c in Zabbix Server before 1.6.6 allows remote attackers to cause a denial of service (crash) via a crafted request with data that lacks an expected : (colon) separator, which triggers a NULL pointer dereference."
    },
    {
      "lang": "es",
      "value": "La función process_trap en trapper/trapper.c en Zabbix Server anteriores a v1.6.6 permite a atacantes remotos provocar una denegación de servicio (caída) a través de una petición manipulada con datos de carece del separador esperado (:), lo que provoca una desreferenciación a puntero NULL.\r\n"
    }
  ],
  "lastModified": "2026-06-16T23:13:47.123",
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